Billy Bunter, in full William George Bunter, fictional character, a fat English schoolboy at Greyfriars School who, though an antihero, is the best-known character in a much-loved series of stories by Frank Richards (Charles Hamilton), published in the English boys’ weekly paper the Magnet (1908–40) and in hardbound books (from after World War II until 1961). After the author’s death in 1961, other writers sporadically contributed to the Billy Bunter canon.

The world of Greyfriars School (a fictional prototypically English boys’ public school) is unchanging, safe, and familiar. Even though Bunter acts foolishly, selfishly, and unheroically in this schoolboy setting, he is a fondly remembered comic character: bespectacled, overweight, dressed in too-tight checkered trousers, and emitting, from time to time, a characteristic cry of “Yarooooh!” To his schoolmates (especially to Harry Wharton, who embodies all the virtues that Billy Bunter lacks), Billy is known as the “Fat Owl of the Remove.”